A company produces on an average 4000 items per month for the first 3 months. How many items it must produce on an average per month over the next 9 months, to average of 4375 items per month over the whole?
A. 4500
B. 4600
C. 4680
D. 4710
Ans: A.Sol.
Required average = (4375 x 12) - (4000 x 3 ) / 9
⇔ 52500 - 12000 / 9
⇔ 40500 / 9
= 4500.
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